Its origins are traced to theatrical traditions where wishing luck directly was considered bad luck. The phrase’s use was intended to avoid jinxing a performer before going on stage.
Expressions that imply the opposite of their intended meaning are known as “counter-phrases.” In theater culture, “break a leg” became a standard way to convey best wishes indirectly.
Today, this expression is widely recognized and used beyond the entertainment industry, but it remains most associated with performances.


